Question

In this assignment, you are going to write a program that will calculate x*x by using shift operations. Details are as follows: x can be any number between 1 - 100. The result x*x will be stored in 0x20000000. You may first find the binary representation of x. In the binary representation, if you see a 1 in the nth bit, you will shift x n times to the left and store the value in the corresponding memory address. The first memory address you will use is 0x20000008, and you will use the next memory address for storing the value you have obtained from remaining shift operations Finally, you will add the values obtained from shift operations, starting in address 0x20000008 and put the final result in 0x20000000. You should select proper data types for the implementation of your program. It should consume iriiliili nurii iamnuni.il, %13,2m iri litelitnry For example: x-22, x-0b10110 2n1 is 1, so x<<1 (x=0b101100, 44 in decimal) will be stored in 0x20000008 2A2 is 1, so x<<2 (x-0b1011000, 88 in decimal) will be stored in 0x2000000C 2A4 is 1, so x<<4 (x-0b101100000, 352 in decimal) will be stored in 0x20000010 Add values stored in 0x20000008, 0x2000000C, 0x20000010 and put the result in 0x20000000. The result in 0x20000000 is 0b111100100, 484 in decimal.

Please solved IAR workbench in C language I have a limited time less than 10 hours

Answer 1

#include <stdio.h>

int main() {
   //code below is accompanied by appropriate comments to explain all the operations performed in detail

//variables required in the program
int x=0, realValue=0, tempValue=0, result=0;

//p is the pointer used to store the values at particular addresses as asked in the question
int *p = 0x20000008UL;
  
//x is used to store the number given as input by the user
printf("Please enter the value of x ( between 1 and 100)");
scanf("%d", &x);
  
//As x is to be processed, realValue stores the actual value of x
realValue=x;

//count1 is used to denote at which but we are currently at
int count1 = 0;

//count2 is used to keep a count of the ON bits in the input number
int count2 = 0;
  
//this loop is used to travel all the bits of x one by one
while(x>0){
if(x&1 == 1){
count2++;
//tempValue is used to store the value of realValue while the realValue is processed
tempValue = realValue;
realValue = realValue<<count1;
*p=realValue;
realValue = tempValue;
p++;
}
x = x>>1;
count1++;
}
  
//this loop is used to add the numbers which are stored by the above loop, in order to calculate the square of //the given number
p = 0x20000008UL;
while(count2>0){
result+=(*p);
p++;
count2--;
}
  
//final is the pointer towards the address in which the final number is stored
int *final = 0x20000000UL;
*final=result;
  
   //this statement is used to print the final result
   printf("The square of the number given as input is: %d", *final);
  
   return 0;
}